Paste-applying mechanism.



H. C. HERR. PASTE APPLYING MEGHANIBM. APPLIUATIDN FILED un. as, 1001.

Patented Feb. 23, 1909. 2 SHEETS-SHEET 1.

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H. G. HERB. PASTE APPLYING MBGHANISM. Arrnxornox nur 23.22.1001.

' 913,008. l Patented Feb. 23, 1909.

2 SHEETS-SHEET 2.

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Pr-XTENT OFFICE.

HEN RY (D. HERR, OF DETROIT, MICHIGA PASTE-APPLYING ME CHANISM.

Application filed April 22, 19H7.

To all whom "it may concern:

Beit known that I, HENRY C. HERR, a citizen of the United States ofAmerica, residing at Detroit, in the county of Wayne and State ofMichigan, have invented certain new and useful Improvements 1n PasteApplylng Mechanism, of which the following is a specification, referencebeing had therein to the accompanying drawings.

The invention relates to paste-applying mechanism., and has for itsobject the obtaining of a construction in which the hardening of theaste, so as to interfere with the operation ofp the mechanism, isprevented.

The invention consists, first, in the means for preventing the formationof a scum or film of hardened paste in the paste receptacle; second, themeans for preventing the hardening of the paste on the paste-applyingroll, and, further, in the peculiar construction, arrangement andcombination of parts as hereinafter set forth.

In the drawings, Figure 1 is a sectional elevation of a portion of amachine provided with my improved pasting mechanism; Fig. 2 is anelevation of a portion of Fig. l; and Fig. 3 is a side elevation of Fig.2. Figs. 4, 5, and 6 are respectively side and front elevations and aplan view of the bung, through which the circulating pipes pass; andFig. 7 is a section. through the pump.

In the construction illustrated, and which will be described, thepaste-applying mechanism is employed for coating the surface of acontinuously fed paper strip used in the manufacture of multi-ply paperboard. My improvements are, however, applicable to other uses. In themanufacture of multiply paper board, the adjacent faces of the paper areusually coated with a rapidly drying adhesive such, for instance, as asolution of silicate of soda. This substance, when exposed to the air,hardens in so short a time that difficulty is experienced in preventingthe clogging of the a paratus, and particularly the formation o a hardscum over the to of the solution in the container therefor. I aveovercome this difficult by providing means for circulating the so utionand for constantly drawin off from the surface and feeding in from beow.

A is a suitable frame work, B a bed or table thereon, over which a paperstrip is fed, and C are rolls for holding the strip on the table.

D is the paste container and E is a pasteapplying roll, having a portionof its circum- Specication of Letters Patent.

Patented Feb. 23, 1909.

Serial No. 369,598.

ference immersed in the paste and another portion normally in contactwith one face of the paper strip, which is preferably held thercagainstby rolls F F.

G is a barrel or other closed receptacle for containinf a quantity ofpaste, in addition to i that whidh is in the container I), and from lwhich the latter is supplied. H and I are respectively out-goin andreturn conduits from thc receptacle ir to the receptacle D. As shown,these conduits pass through a bung J, one of them extending by thc tubeK to the bottom of the receptacle G and the other terminating at the topof said receptacle. The opposite ends of the conduits are connected tothe tank D, and the conduit I extends upward therein to the )lane inwhich it is desired to maintain the level of the surface of the liquid.

L is a pump arranged to ropcl the liquids through the conduits H an I.

With the construction as thus far explained, whenever the pump Ii is inmotion, the fluid is constantly delivered through the conduit II intothe receptacle D, being withdrawn from the receptacle G, while this willcreate a artial vacuum in said receptacle, which wi l suck the overflowin the receptacle D throu 4h the conduit I and back into the receptac eG. Inasmuch as the conduit I extends near the surface of the fiuid inthe receptacle D, there will be a constant movement from all portions ofsaid surface towards the said conduit I, so that no portion of the fluidis permitted to remain exposed to the air for a sufficient length oftime to harden.

The roll E is preferably driven by the friction of the paper strip whendrawn thereover. It is, however, frequently necessary to throw the rollout of contact with the stri as where a new strip is to be engaged witthe machine, and I have therefore provided means for `raising andlowering the roll comprising a pair of rock arms M and a cam N forengaging one of said arms to raise and lower the same. When the roll isout of contact with the paper, the hardening of the solution upon itssurface is prevented by the provision of an auxiliary mechanism forrotating the roll. This preferably consists of sharp toothed ears O andP respectively on the shafts of t e roll E and on the constantiT drivenshaft Q. The arrangement is suc that whenever the rock arms M arelowered by the operation of the cam N, the

wheels O and P will so that the roll E is driven.

be thrown into mesh, l/Vhen the rock arms M are again raised, theengagement between the gears O and P is broken, so that the roll E maybe driven solely by the paper strip and at the same time peripheral seed.

When the apparatus is not in use, i any of the paste is permitted toremain in the receptacle D it would harden and interfere with thesubsequent operation. I have, therefore, provided means for drainingthis receptacle, and to this end the outlet conduit I has a portion Iwhich extends from the bottom of the receptacle to the level of theoveriow. The receptacle D is also formed With an inclined bottom so asto drain its contents to the outlet ipe when the section I is removed.Thus, by removing this section, the paste is permitted to feed bygravity into the container G. Inasmuch, however, as the container G is aclosed rece itacle, it is necessary to provide an escape ier the airtherein, which is to be dis laced by the paste from the receptacle D.lier this purpose, I preferably provide a pet cock S, and preferablarran e this on the bung.

Vllhat I c aim as my invention is:

1 In a pasting apparatus, the combination with an open top receptacle,of a closed container and fluid circulating connections between saidreceptacle and container whereby the surface portion of the fluid insaid receptacle is constantly returned to the container and the supplyto said receptacle is renewed from the container.

2. In a pasting a paratus, the combination with a receptac e containingthe paste Huid, of a paste-applying roll immersed in said uid, means forrotating said roll hy the movement of the material to be coated withpaste and auxiliary means for rotating said roll while out of contactwith the material to be coated.

3. In a tion with a pasting apparatus, the combinaaste receptacle, ofmeans for feeding a strlp to be asted thereabove, a paste-applying roll,and) means for vertically adjusting said roll into or out of contactwith said strip whereby a normal operation of the roll is driven fromthe strip, and auxiliary means for drivin the roll upon the lowering ofthe same out 0I contact wlth said strip.

4. A pasting apparatus comprising a receptacle for the paste, and fromwhich it is l applied to the work, a container for a supply aste,connections between said receptacle an container, and means forwithdrawing the surface portion of the Huid to prevent the formation ofa scum and to maintain a con stant level.

5. A pasting apparatus com rising a rece tacle for the paste, from wiich1t is a p ied to the work, a container for a supply o paste, and meansfor forcing a circulation of the aste from said container to saidreceptac e, and means for withdrawing the surface portion of the fluidto prevent the formation of' a scum and to maintain a constant level.

6. A pastingl apparatus comprising a rece tacle for the paste, from Wich it is app ied to the work, a closed container for a supply of paste,means constantly operating whi e the apparatus is in use for circulatingthe paste from said container to and from said receptacle, and forwithdrawin the surface portlon of the fiuid and means or draining thepaste in said receptacle back into said container when the apparatus isnot in use.

7. A pasting apparatus com rising a rece tacle for the paste, from w ich1t 1s a p led to the Work, a container for a supply o paste, connectionsbetween said container an receptacle, a pump constantly operating whilethe apparatus is in use for propelling the paste from said container tosaid receptacle and an overflow through which the surplus paste isreturned to said container by the combined action of gravity andsuction.

8. A pasting apparatus complrising a recelptacle for the paste, from wich 1t is app ied to the work, a closed container for a supply of pastearranged at a lower level, connections between said receptacle andcontainer, including an overiow connection for normally maintaining aquantity of paste in said receptacle, means for draining said receptaclewhen not in use, and means for venting said container to permit of thedisplacement of the air therein during the drainage of the aste from thereceptacle.

In testimony wlliereof I aiix my signature in presence of two witnesses.

HENRY C. HERR.

Witnesses:

NELLIE KINsELLA, JAMES P. BARRY.

